Apple Developer Account crash

Open again and when you select "Apple Developer Account" in properties, hang then system crash. Also when you open "iOS Bundle Signing"(in Xamarin.iOS project options) in shows no properties listed. Alter enabling "Xamarin.Mac development" extension all works.

I am in Beta channel(7.1 Build 1294). Same in Alpha. Stable works properly.

I have similar problem. "Xamarin.Mac.development" is already enabled. I tried to disable it and enable it again with no luck. I re-installed Visual Studio 2017 again, also with no luck. Please release the update ASAP.